Lecture Room - Season 252 Episode 4

Season 1 Season 2 Season 3 Season 4 Season 5 Season 6 Season 7 Season 8 Season 9 Season 10 Season 11 Season 12 Season 13 Season 14 Season 15 Season 16 Season 17 Season 18 Season 19 Season 20 Season 21 Season 22 Season 23 Season 24 Season 25 Season 26 Season 27 Season 28 Season 29 Season 30 Season 31 Season 32 Season 33 Season 34 Season 35 Season 36 Season 37 Season 38 Season 39 Season 40 Season 41 Season 42 Season 43 Season 44 Season 45 Season 46 Season 47 Season 48 Season 49 Season 50 Season 51 Season 52 Season 53 Season 54 Season 55 Season 56 Season 57 Season 58 Season 59 Season 60 Season 61 Season 62 Season 63 Season 64 Season 65 Season 66 Season 67 Season 68 Season 69 Season 70 Season 71 Season 72 Season 73 Season 74 Season 75 Season 76 Season 77 Season 78 Season 79 Season 80 Season 81 Season 82 Season 83 Season 84 Season 85 Season 86 Season 87 Season 88 Season 89 Season 90 Season 91 Season 92 Season 93 Season 94 Season 95 Season 96 Season 97 Season 98 Season 99 Season 100 Season 101 Season 102 Season 103 Season 104 Season 105 Season 106 Season 107 Season 108 Season 109 Season 110 Season 111 Season 112 Season 113 Season 114 Season 115 Season 116 Season 117 Season 118 Season 119 Season 120 Season 121 Season 122 Season 123 Season 124 Season 125 Season 126 Season 127 Season 128 Season 129 Season 130 Season 131 Season 132 Season 133 Season 134 Season 135 Season 136 Season 137 Season 138 Season 139 Season 140 Season 141 Season 142 Season 143 Season 144 Season 145 Season 146 Season 147 Season 148 Season 149 Season 150 Season 151 Season 152 Season 153 Season 154 Season 155 Season 156 Season 157 Season 158 Season 159 Season 160 Season 161 Season 162 Season 163 Season 164 Season 165 Season 166 Season 167 Season 168 Season 169 Season 170 Season 171 Season 172 Season 173 Season 174 Season 175 Season 176 Season 177 Season 178 Season 179 Season 180 Season 181 Season 182 Season 183 Season 184 Season 185 Season 186 Season 187 Season 188 Season 189 Season 190 Season 191 Season 192 Season 193 Season 194 Season 195 Season 196 Season 197 Season 198 Season 199 Season 200 Season 201 Season 202 Season 203 Season 204 Season 205 Season 206 Season 207 Season 208 Season 209 Season 210 Season 211 Season 212 Season 213 Season 214 Season 215 Season 216 Season 217 Season 218 Season 219 Season 220 Season 221 Season 222 Season 223 Season 224 Season 225 Season 226 Season 227 Season 228 Season 229 Season 230 Season 231 Season 232 Season 233 Season 234 Season 235 Season 236 Season 237 Season 238 Season 239 Season 240 Season 241 Season 242 Season 243 Season 244 Season 245 Season 246 Season 247 Season 248 Season 249 Season 250 Season 251 Season 252 Season 253 Season 254 Season 255 Season 256 Season 257 Season 258 Season 259 Season 260 Season 261 Season 262 Season 263 Season 264 Season 265 Season 266 Season 267 Season 268 Season 269 Season 270 Season 271 Season 272 Season 273 Season 274 Season 275 Season 276 Season 277 Season 278 Season 279 Season 280 Season 281 Season 282 Season 283 Season 284 Season 285 Season 286 Season 287 Season 288 Season 289 Season 290 Season 291 Season 292 Season 293 Season 294 Season 295 Season 296 Season 297 Season 298 Season 299 Season 300 Season 301 Season 302 Season 303 Season 304 Season 305 Season 306 Season 307 Season 308 Season 309 Season 310 Season 311 Season 312 Season 313 Season 314 Season 315 Season 316 Season 317 Season 318 Season 319 Season 320 Season 321 Season 322 Season 323 Season 324 Season 325 Season 326 Season 327 Season 328 Season 329 Season 330 Season 331 Season 332 Season 333 Season 334 Season 335 Season 336 Season 337 Season 338 Season 339 Season 340 Season 341 Season 342 Season 343 Season 344 Season 345 Season 346 Season 347 Season 348 Season 349 Season 350 Season 351 Season 352 Season 353 Season 354 Season 355 Season 356 Season 357 Season 358 Season 359 Season 360 Season 361 Season 362 Season 363 Season 364 Season 365 Season 366 Season 367 Season 368 Season 369 Season 370 Season 371 Season 372 Season 373 Season 374 Season 375 Season 376 Season 377 Season 378 Season 379 Season 380 Season 381 Season 382 Season 383 Season 384 Season 385 Season 386 Season 387 Season 388 Season 389 Season 390 Season 391 Season 392 Season 393 Season 394 Season 395 Season 396 Season 397 Season 398 Season 399 Season 400 Season 401 Season 402 Season 403 Season 404 Season 405 Season 406 Season 407 Season 408 Season 409 Season 410 Season 411 Season 412 Season 413 Season 414 Season 415 Season 416 Season 417 Season 418 Season 419 Season 420 Season 421 Season 422 Season 423 Season 424 Season 425 Season 426 Season 427 Season 428 Season 429 Season 430 Season 431 Season 432 Season 433 Season 434 Season 435 Season 436 Season 437 Season 438 Season 439 Season 440 Season 441 Season 442 Season 443 Season 444 Season 445 Season 446 Season 447 Season 448 Season 449 Season 450 Season 451 Season 452 Season 453 Season 454 Season 455 Season 456 Season 457 Season 458 Season 459 Season 460 Season 461 Season 462 Season 463 Season 464 Season 465 Season 466 Season 467 Season 468 Season 469 Season 470 Season 471 Season 472 Season 473 Season 474 Season 475 Season 476 Season 477 Season 478 Season 479 Season 480 Season 481 Season 482 Season 483 Season 484 Season 485 Season 486 Season 487 Season 488 Season 489 Season 490 Season 491 Season 492 Season 493 Season 494 Season 495 Season 496 Season 497 Season 498 Season 499 Season 500 Season 501 Season 502 Season 503 Season 504 Season 505 Season 506 Season 507 Season 508 Season 509 Season 510 Season 511 Season 512 Season 513 Season 514 Season 515 Season 516 Season 517 Season 518 Season 519 Season 520 Season 521 Season 522 Season 523 Season 524 Season 525 Season 526 Season 527 Season 528 Season 529 Season 530 Season 531 Season 532 Season 533 Season 534 Season 535 Season 536 Season 537 Season 538 Season 539 Season 540